InfoWorld

When to use abstract classes vs. interfaces in Java

Abstract classes and interfaces in Java serve fundamentally different purposes. Learn the differences between these Java language elements and how to use them in your programs. Abstract classes and ...
InfoWorld

Abstract classes and interfaces practicum

Readers have returned quite a bit of feedback concerning, “Abstract Classes Vs. Interfaces” from April 2001. A recurring request asks to see a complete example of using interfaces and abstract classes ...
InfoQ

Java Feature Spotlight: Sealed Classes

The release of Java SE 15 in Sept 2020 will introduce "sealed classes" (JEP 360) as a preview feature. A sealed class is a class or interface which restricts which other classes or interfaces may ...
Ars Technica

interfaces and abstract classes, what am i doing wrong?

I would like MyCorpEmployees to have MyCorpEmployee overlords and underlings, and OtherEmployees to have OtherEmployee overlords and underlings. or, i did yesterday. i'm really thinking along the ...
TheServerSide

A simple Java Function interface example: Learn Functional programming fast

Community driven content discussing all aspects of software development from DevOps to design patterns. If you want to master functional programming, the best place to start is with the Java Function ...